GoPro HD Helmet Hero 1080p Helmet Camera and Camcorder for $129.99 shipped.  Here is a screenshot for your reference.  It features 1080p/960p/720p video recording at 30 and 60 fps, 5MP photo, 1.5" status LCD, up to 2.5 hours of recording, and up to 180-ft water-resistance.  Most places have this helmet camera/camcorder for about $149 or more.